International route
Cheap flights from Chicago to London
O'Hare International Airport (ORD) to London Heathrow Airport (LHR). 3,942 miles, 7h 40m nonstop.
ORD to LHR at a glance
Computed from airline schedules and the fares we track for this route. Refreshed several times a day.
- Distance
- 3,942 milesgreat-circle
- Typical flight time
- 7h 40mnonstop, gate to gate
- Nonstop airlines
- AAUAB6BA5 airlinesAmerican, United, JetBlue
- Nonstop flights per day
- 9all airlines combined
- Cheapest month
- January 2027over the next six months
- Best day to fly
- Tuesday22% less than Sunday
- Time difference
- 6h aheadLondon vs Chicago
Chicago to London
Round trips from $335
Per traveler, taxes and fees included. Lowest fare we found departs Wed, Jan 6.
Cheapest month: January 2027
See fares on these datesLock any fare free — pay only when you accept your last-minute deal
Or ask an agent on WhatsAppChicago to London fares by month
Lowest round-trip economy fare per traveler in each of the next six months, taxes and fees included. Select a month to search that date.
Airlines flying Chicago to London
5 airlines fly nonstop with 9 departures a day combined, plus 14 more with one stop.
- AAAmerican AirlinesoneworldNonstop · 2 flights a day · first checked bag from $40
- BABritish AirwaysoneworldNonstop · 2 flights a day · first checked bag from $75
- UAUnited AirlinesStar AllianceNonstop · 2 flights a day · first checked bag from $40
- VSVirgin AtlanticSkyTeamNonstop · 2 flights a day · first checked bag from $75
- B6JetBlueNonstop · 1 flight a day · first checked bag from $40
- EIAer LingusConnecting via SNN · first checked bag from $70
- ACAir CanadaStar AllianceConnecting via YUL, YYC · first checked bag from $35
- AFAir FranceSkyTeamConnecting via CDG, ORY · first checked bag from $75
- OSAustrian AirlinesStar AllianceConnecting via VIE · first checked bag from $75
- DLDelta Air LinesSkyTeamConnecting via ATL, MSP, DTW, SLC, JFK, BOS, LGA · first checked bag from $35
- AYFinnaironeworldConnecting via HEL · first checked bag from $70
- FIIcelandairConnecting via KEF · first checked bag from $70
- AZITA AirwaysConnecting via FCO · first checked bag from $70
- LHLufthansaStar AllianceConnecting via FRA, MUC · first checked bag from $75
- NONorse Atlantic AirwaysLow-costConnecting via OSL · first checked bag from $80
- SKSAS Scandinavian AirlinesSkyTeamConnecting via ARN, OSL · first checked bag from $70
- LXSWISSStar AllianceConnecting via ZRH, GVA · first checked bag from $75
- TPTAP Air PortugalStar AllianceConnecting via OPO · first checked bag from $70
- WSWestJetConnecting via YYZ · first checked bag from $35
Connecting options
Hubs where one airline can carry you on both legs, most choices first.
- Oslo (OSL)SKNO2 airlines
- Atlanta (ATL)DL1 airline
- Minneapolis (MSP)DL1 airline
- Detroit (DTW)DL1 airline
- Salt Lake City (SLC)DL1 airline
Which airport should I use?
Chicago has 2 airports and London has 3 airports. Fares can differ by $50 to $150 round trip between them, so check the alternatives before you book.
Other departure airports near Chicago
Tips for this route
- American, United, JetBlue and British all fly ORD to LHR nonstop, so compare the total with bags before picking the lowest base fare: the difference between a basic and a standard economy ticket is often less than one checked bag each way.
- January 2027 is the cheapest month to fly over the next six months, with round trips from $335; September 2026 is the most expensive at $493 and up, a difference of $158 per traveler.
- Departing on a Tuesday averages 22% less than a Sunday on this route. If your dates are flexible, shift the outbound by a day or two and check the calendar view before you book.
- Book 6 to 12 weeks ahead; fares climb in the last three weeks and around holidays.
- London is 6 hours ahead of Chicago. Expect to lose 6 hours on the clock heading east, so an overnight or late-afternoon departure tends to arrive at a more usable hour.
Destination guide
London: The most-flown transatlantic route, for good reason
London is the busiest international destination from the US, with nonstops from more than 30 American cities into Heathrow and Gatwick. The museums are free, the theater is world-class and the Tube reaches everything — including Heathrow.
Best time to visit: May–June and September are mild with long days; July–August is warm and busy. December has Christmas markets and lights. January–March is cold and gray but fares can drop below $500 round trip.
Flying the other way? London to ChicagoFares, airlines and tips for LHR to ORD.Ready to compare live fares?
See every airline on ORD–LHR side by side with bags and seat rules spelled out.
Search Chicago to LondonChicago to London: common questions
How long is the flight from Chicago to London?
A nonstop flight from Chicago (ORD) to London (LHR) takes about 7h 40m gate to gate, covering 3,942 miles. Connecting itineraries add the layover, typically 2 to 5 hours more in total.
Which airlines fly nonstop from ORD to LHR?
American Airlines, United Airlines, JetBlue, British Airways and Virgin Atlantic operate nonstop flights from Chicago (ORD) to London (LHR), with 9 nonstop departures a day between them. One-stop options connect through OSL, ATL and MSP.
What is the cheapest month to fly from Chicago to London?
Over the next six months, January 2027 has the lowest round-trip fares from Chicago (ORD) to London (LHR), starting at $335 per traveler including taxes and fees. Within any month, Tuesday departures average the lowest prices.
How far in advance should I book Chicago to London flights?
Book 6 to 12 weeks ahead; fares climb in the last three weeks and around holidays. Air1 Tickets includes free cancellation within 24 hours of booking on every fare, so you can lock in a good price and keep looking.
What is the time difference between Chicago and London?
London is 6 hours ahead of Chicago. ORD is on America/Chicago time and LHR on Europe/London time. Departure and arrival times in search results are always shown in local time at each airport.
Related routes
Other popular city pairs from the same departure city and to the same destination, with the lowest round-trip fares we found.